Manufacturing steel strip



Jan. 16, 1968 P. J. SNYDER MANUFACTURING STEEL STRIP Filed March 23, 1966 FIG. I.

Z l F FIG. 3.

INVENTOR Peter J. Snyder United States Patent 3,363,297 MANUFACTURING STEEL STRIP Peter J. Snyder, 6723 Smithfield St., McKeesport, Pa. 15135 Filed Mar. 23, 1966, Ser. No. 536,845 8 Claims. (Cl. 2918) ABSTRACT OF THE DISCLOSURE Metal strip is made by rotating a cylindrical ingot and advancing a reciprocating tool edge against the ingot causing a strip to peel from the ingot.

This invention relates to a method and apparatus for making strip steel. More particularly the invention relates to making strip steel by peeling it from a nearly white hot cylindrical shaped steel ingot at approximately between 1500 F. to 1800 F.

At present hot strip steel is manufactured from steel slabs which are heated to a high temperature and then rolled through seven to ten stands of four high rolling mills. This results in a high grade of strip steel. The steel, however, is very hard because of the forging action caused by rolling and because of the water quenching which is used on the roll surfaces to keep them cool. The hardness is undesirable because further cold rolling requires massive and costly equipment to reduce the thickness of the steel strip.

The present invention solves the problem of hardened strip and produces a much softer strip by eliminating the forging and water quenching action. The resulting strip steel provides easier reduction in thickness by the ensuing cold rolling method. The invention thereby eliminates much costly equipment in the manufacture of strip steel.

I provide a method of manufacturing strip steel which comprises, providing a nearly white hot cylindrical shaped steel ingot, rotating the white hot cylindrical ingot, peeling a continuous steel strip from the rotating cylindrical shaped steel ingot with a tool containing a reciprocating serrated knife edge and then passing the steel strip to a wrapping reel by means of a plurality of driven rollers. The strip from the serrated knife to the take up reel is placed under tension through a pair of power driven guide rollers by the pull exerted by the driven rollers in combination with a power driven wrapping reel. The take up reel is assisted in wrapping the initial strip around the take up reel by -a belt wrapper. A coolant is sprayed on the cutting tool to keep it cool.

I provide an apparatus for making strip steel from a cylindrical shaped rotating nearly white hot steel ingot which comprises, a cutting tool extending the length of the longitudinal axis of the cylindrical ingot, means slidably holding the cutting tool, means longitudinally reciprocating the cutting tool within the means slidably holding, and a carriage member slidable perpendicular to the longitudinal axis of the cylindrical steel ingot, the carriage supporting the means holding the reciprocating cutting tool, the carriage is advanced to the steel ingot until the cutting tool contacts the cylindrical ingot and peels a steel strip from it. I preferably provide a serrated cutting edge tool that is longitudinally reciprocated by a coupling to an eccentric mounted on a motor shaft. I provide a plurality of power driven guide rollers mounted on the carriage member for guiding the steel strip to a take up reel. The guide rollers each have a guide curved partially around the strip for guiding the strip around the guide rollers.

Other details, objects and advantages of the invention will become apparent as the following description of a ice present preferred embodiment and present preferred meth- 0d of practicing the same proceeds.

In the accompanying drawings I have shown a present preferred embodiment of the invention and have illustrated a present preferred method of practicing the same in which:

FIGURE 1 is a longitudinal sectional view of the ap paratus;

FIGURE 2 is a sectional end view of FIGURE 1 taken at the line AA;

FIGURE 3 is a side view showing eccentric mounted on motor shaft; and

FIGURE 4 is a sectional view of FIGURE 2 taken at the line CC.

A nearly white hot cylindrical shaped steel ingot 1 is suitably mounted and rotated in an apparatus similar to a wood veneering lathe. The apparatus for rotating the cylindrical ingot is not shown. A serrated cutting edge tool or knife 2 which will hold its cutting edge at elevated temperatures is welded to a body 3. The body 3 rests on a bearing plate 4 and within a body holder 5. A groove 6 is provided along the entire length of body 3 into which a tongue 7 extending the length of body holder 5 engages. Body 3 fits within body holder 5 so as to provide sliding clearance. The body holder 5 is prevented from lateral or horizontal movement by key 8 which engages a keyway in the carriage 9. The key 8 is held in place by a bolt 10. Bolts 11 secure the body holder 5 to the carriage 9. The end of body 3 has a bore into which a porous bronze bushing 12 is fitted as shown on section CC. A trunnion 13 has one end linked to the body 3 by a pin 14 which is held by a keeper plate 15. The other end of trunnion 13 is bored to receive an oil bearing porous bushing 16. The inside diameter of bushing 16 contains an eccentric 17 and is keyed to motor shaft 18 of motor 20 by key 19. The serrations in cutting edge of knife 2 must be spaced at one half the distance (or less) of stroke of trunnion 13 imparted by eccentric 17.

The top of the serrations cut the steel ingot as the knife 2 reciprocates from left to right and back at a very rapid rate in order to prevent creating streaks in the hot strip being peeled. The reciprocating rate of the knife 2 must be several times faster than the speed at which the nearly white hot ingot 1 is revolved in the peeling lathe. Also, the distance between serrations on the knife 2 should be one half (or less) of the distance of the stroke of trunnion 13.

Power driven rollers 21 and 22 are mounted on carriage 9. Guide frames 23 and 24 are also mounted on carriage 9. The guide frames 23 and 24 assist in threading the strip partially around rollers 21 and 22 when strip is beginning to be peeled from ingot 1. The strip is passed partially around guide rollers 21 and 22 and is assisted around the take up reel 25 by a retractable belt wrapper 26 which is a standard product. A water header 27 if necessary has a series of spray nozzles 28 from which water is sprayed upon body 3 to prevent the knife 2 from overheating.

The nearly white hot steel ingot 1 is rotated on a suitable lathe. The carriage 9 carrying the reciprocating serrated edge cutting knife 2 is advanced at a certain predetermined speed depending upon the desired thickness of hot strip to be peeled into the steel ingot 1 until strip is being continuously peeled into one long steel strip. This strip is guided around rollers 21 and 22 by guides 23 and 24. The strip is wound around take up reel 25 by the assistance of a belt wrapper 26. After the strip wraps around the take up reel 25 two or three wraps the belt wrapper 26 is retracted. After there is tension created in the peeled strip between the cutting edge of the reciprocating knife 2 and the take up reel 25, the take up reel which is suitably powered together with lathe which revolves the white hot ingot 1, are both substantially speed up whereby the reciprocating serrated knife edge 2 would be assisted in cutting without a great deal of effort.

While I have shown and described a present preferred embodiment and have illustrated a present preferred method of practicing the same it is to be distinctly understood that the invention is not limited thereto but may be otherwise variously embodied within the scope of the following claims.

I claim:

1. An apparatus for making strip steel from a cylindrical shaped rotating white hot steel ingot which comprises:

( 1) a cutting tool extending the length of the longitudinal axis of the cylindrical ingot;

(2) means slidably holding the cutting tool;

(3) means longitudinally reciprocating the cutting tool within the means slidably holding; and

(4) a carriage member slidable perpendicular to the longitudinal axis of the cylindrical steel ingot, the carriage supporting the means holding the cutting tool and the means longitudinally reciprocating the cutting tool, the carriage is advanced to the steel ingot until the cutting tool contacts the cylindrical ingot and peels a continuous steel strip from it.

2. An apparatus as recited in claim 1 wherein the cutting tool comprises a serrated cutting edge.

3. An apparatus as recited in claim 2 wherein the means longitudinally reciprocating the serrated knife comprises:

(1) a motor;

(2) an eccentric mounted on the motor shaft;

(3) a trunnion to the eccentric on the coupled motor shaft;

(4) a member having one end connected to another end of the trunnion, the other end of the member is connected to an end of the serrated knife whereby revolutions of the motor shaft result in reciprocal movement of the serrated knife.

4. An apparatus as recited in claim 3 including:

('1) a plurality of guide rollers mounted on the carria-ge member guiding the peeled strip away from the ingot;

(2) a plurality of guides curved partially around the rolls so as to guide the strip, the guides are mounted in the carriage member;

(3) a take up reel for winding the strip as the strip is received from the guide rolls; and

(4) a belt wrapper for initially assisting the wrapping of the strip around the take up reel.

5. An apparatus as recited in claim 4 including a water jet directed to the serrated knife cutting tool for cooling the knife as it cuts.

6. An apparatus for continuously forming metal strip from an ingot comprising:

ingot.

References Cited UNITED STATES PATENTS 3,262,182 7/1966 Duret 29-18 1,701,889 2/1929 Junker 2918 RICHARD H. EANES, IR.,' Primary Examiner. 

